SDLT320 Drive on AIX 5.3 - Aix

This is a discussion on SDLT320 Drive on AIX 5.3 - Aix ; I am trying to install QUantum SDLT320 Drive on IBM p-550 server running AIX 5.3 on SCSI interface.
I have configured the drive and made it 'available'. But when I try to take a backup using 'smit' it fails with ...

SDLT320 Drive on AIX 5.3

I have configured the drive and made it 'available'. But when I try to take a backup using 'smit' it fails with message ' media error-error writing to device.' The drive is a brand new drive and I have tried 2-3 different brand new media.

I have also made changes to parameters using chow/change device settings using smit.